netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'.
------------[ cut here ]------------
WARNING: CPU: 1 PID: 15555 at net/core/dev.c:9600 dev_index_reserve+0xf8/0x210
Modules linked in:
CPU: 1 PID: 15555 Comm: syz-executor.2 Not tainted 6.6.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:dev_index_reserve+0xf8/0x210 net/core/dev.c:9600
Code: ee c1 aa f8 2e 2e 2e 31 c0 4c 89 e7 e8 51 7a 21 02 4c 89 e7 48 89 de 31 d2 b9 c0 0c 00 00 e8 8f 87 13 02 eb 69 e8 78 76 d6 f8 <0f> 0b bb ea ff ff ff e9 93 00 00 00 e8 67 76 d6 f8 49 83 c7 50 bf
RSP: 0018:ffffc9000353fb20 EFLAGS: 00010287
RAX: ffffffff88b79738 RBX: 00000000b719c363 RCX: 0000000000040000
RDX: ffffc900060a9000 RSI: 0000000000000dbf RDI: 0000000000000dc0
RBP: ffffc9000353fbb0 R08: ffffffff88b796ce R09: 1ffff1100f363810
R10: dffffc0000000000 R11: ffffed100f363811 R12: dffffc0000000000
R13: 1ffff920006a7f68 R14: 1ffff920006a7f64 R15: ffff88801ed3d7c0
FS:  00007f9b5f9636c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f822000 CR3: 000000005e801000 CR4: 00000000003526e0
DR0: 0000000000000002 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 register_netdevice+0x76a/0x1510 net/core/dev.c:10088
 tun_set_iff+0x861/0xe80 drivers/net/tun.c:2850
 __tun_chr_ioctl+0x872/0x2490 drivers/net/tun.c:3118
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xf8/0x170 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9b5ec7cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9b5f9630c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9b5ed9bf80 RCX: 00007f9b5ec7cae9
RDX: 0000000020000200 RSI: 00000000400454ca RDI: 0000000000000003
RBP: 00007f9b5ecc847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f9b5ed9bf80 R15: 00007ffc31070e88
 </TASK>